Eleven: Fix top tracks to play the track you select

There was a trade-off where we don't update the toptracks list while you are looking at it
because each song play could change the order, but the caveat was playing a song wouldn't
necessarily play the song you want.  The fix is to use the adapter's list and not re-query
the list

https://cyanogen.atlassian.net/browse/MUSIC-127

Change-Id: Iec882e156658c76986d365d6b2e5d16416aca9ac